Dear all,

I want to generate a variable indicating the highest age of either a mother or father. Specifically, that variable would take a value of 1 if either age of father is older than that of mother or vice versa.
Here is my data example. Thank you.
Code:
clear
input int id long(fage mage)
  1 89 83
  3  . 84
  5 80 77
  7  . 74
  8  . 90
 15  . 83
 16  . 82
 24  . 85
 26  . 91
 30 85 80
 34 89 89
 36  . 88
 40  . 86
 41  . 90
 43 93 74
 44  . 85
 45 75 74
 46  . 93
 54  . 75
 67  . 96
 68  . 89
 72  . 89
 73  . 90
 74  . 82
 75  . 84
 77 82 80
 79  . 83
 81  . 90
 83 79 76
 95  . 79
 97  . 80
 98  . 96
 99  . 87
103  . 91
104  . 89
105 80 78
109 81 80
110  . 88
111  . 84
112  . 79
113  . 80
120  . 86
122 83 77
125  . 91
127 81 83
131  . 87
132 85 82
133  . 91
135 87 81
138 83 83
139 86 78
145 84 79
146  . 92
149  . 82
151  . 86
154  . 93
158  . 82
163  . 91
164  . 95
165  . 78
169  . 82
170  . 94
173 86 84
174 90 84
177  . 78
178  . 88
179  . 86
182  . 74
188  . 96
193 85 78
199  . 87
200  . 82
206  . 92
211  . 85
216  . 81
217 84 80
218 82 76
221  . 82
222  . 76
224  . 88
225  . 83
230  . 86
231  . 96
241  . 83
244  . 84
245  . 76
247  . 78
248  . 88
250  . 80
253  . 83
260 78 85
262  . 87
263  . 82
264 81 77
268  . 76
273  . 84
276 74 74
277  . 85
281  . 83
283  . 77
end